Corner step stool



FIG. 1 is a perspective view of a corner step stool showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left elevational view thereof;

FIG. 5 is a right elevational view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom view thereof;

FIG. 8 is a perspective view from another direction of the corner step stool; and,

FIG. 9 is a perspective view from yet another direction of the corner step stool. 

CLAIM The ornamental design for a corner step stool, as shown and described. 